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No. 6I8,I78A Patented Jan. 24, |899. H. P. LIPPINCOTT.

GLASS PRESS.

(Application filed Aug. 24, 189B.)

(No Model.)

WITNESSES 1 INVENTOR fm @a www MW JMMQM www BY fmw on. Dv c. we wamsPETERS oo., Puoroumo wsumar llNiTE STATES PATENT OFFICE.

RANDOLPH P. LIPPINCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TOSALMON B. ROIVLEY, OF SAME PLACE.

GLASS-PRESS.

SPECIFICATION forming part of Letters Patent No. 618,178, dated January24, 1899.

Application filed August 24, 1898. Serial No. 689,370. (N model.)

To @ZZ whom it may concern:

Be it known that I, RANDOLPH P. LIPPIN- COTT, a citizen of the UnitedStates, residing at Philadelphia, county of Philadelphia, and

State of Pennsylvania, have invented a new and useful Improvement inGlass-Presses, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, whichform a part of zo this specification.

My invention relates particularly to that class of glass-presses inwhich the press or movable member is in two parts, the follower and theplunger, both of which have a movement downward until the follower takesits seat, and then the plunger has a further independent movement. Inthis type of machine there is a spring connection between the plungerand follower which is relied upon to maintain the follower in position.In practice I have found this has some defects in not always maintainingthe follower in fixed position, and as the follower carries a part ofthe mold this is quite disadvantageous; and myinvention has for itsobject to prevent this occurring by locking the follower in its positionand automatically locking and releasing the follower at the propertimes. I accomplish this in the following manner, which is clearlyillustrated in the accompanying drawings, in which- Figure l is a frontview of the device. 2 is a side elevation of the device.

A is the table, carrying the fixed molds a of the press.

B is the follower, carrying a part of the movable mold, and C is theplunger, connected to the piston-rod c, which is operated from thecylinder D. I have shown this plunger operated by a piston-rod. It mightbe operated by a lever or in any manner, as the power to drive thepiston forms no part of my invention. l; is the follower-plate, and cthe plunger-plate, which surrounds the rods lf', and between which plateo and the followerplate l1 are the springs (l. rlhe plunger-plate cextends beyond the rods 712 and is provided at its ends with the pinsE,which work in the slots e of the arms F, pivoted to the frame ofthemachine. One part of the slot-eis straight and the Fig.

remainder inclined. The arms F are of suflicient length so that whenswung over they will be within the line of the follower and when thefollower is down will rest over said follower. The means by which I movethis lever is as follows: As before described, the slot e has a verticaland an inclined portion. The length of the vertical portion is equal tothe length of travel of the follower and plunger together. As aconsequence, in the downward movement of the plunger and followertogether the arms F are held outward. IVhen the plunger moves downwardalone, the follower beingin its ultirnate position, the pins E meet theinclined portion of slots e and the arms F swing over above thefollower-plate and hold it in position. On the return movement, theiirst movemeut of the plunger upward, through the medium of pins E,acting on the inclined p0rtion of the slots c, the arms F are pushedoutward free from the follower-plate, so that when the time for theupward movement of the follower-plate is reached it is free to moveupward.

Having now fully described myinvention, what I claim, and desire toprotect by Letters Patent, is

l. In a glass-pressing machine, in combination with the plunger andfollower, the plunger having a movement with, and a movement independentof the follower, of a swinging arm, there being a slot in said arm, oneportion of which is inclined, a pin moving in said slot, and connectionbetween said pin and said plunger, the pin traveling in the inclinedportion of the slot during the independent movement of the plunger.

2. In a glass-pressing machine, the combination with the plunger andfollower, the plunger having a movement with and a movement independentof the follower, of a swinging arm normally out of alinement with thefollower, and a connection between said plunger and arm adapted in theindependent movement of the plunger to swing said arm intoalinementvwith the follower for the purpose specified.

3. In a glass-pressing machine, the combination with the plunger andfollower,the plunger having a movement with and amovement IOC),

independent of the follower, of means for positively looking thefollower during the independent movement of the plunger.

I. In a glass-pressing machine, the combination with the plunger andfollower adapted to move downwardly to press the glass and thenupwardly, the plunger having in both directions a movement with and amovement independent of the follower, and means for 1o positivelylocking the follower during the invdependent downward movement1 of theplunger and for releasing the follower during the upward movement of theplunger.

In testimony of which invention I have hereunto set my hand, atPhiladelphia, on this 10th day of August, 1898.

RANDOLPH P. LIPPINCOTT.

IVitnesses:

FRANK S. BUssER, M. FRANCES ELLIS.

